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J Neurosci:提振谷氨酸受体恢复FTD小鼠的突触功能

2014-12-10 佚名 生物谷

根据发表在Journal of Neuroscience杂志的一项研究证实:一种提提振特定类型神经递质受体功能的药物可以给老年痴呆症患者的第二个最常见类型(额颞叶痴呆症)提供治疗效益。 额颞叶痴呆症被称为FTD,是一种破坏性的疾病,其中患者有行为,个性和社会技能的巨大变化。FTD发病年龄是相对年轻的,发病年龄是在50岁末左右。患者预后严峻,病情会迅速恶化,通常在发病后10年内死亡。目前,还没

根据发表在Journal of Neuroscience杂志的一项研究证实:一种提提振特定类型神经递质受体功能的药物可以给老年痴呆症患者的第二个最常见类型(额颞叶痴呆症)提供治疗效益。

额颞叶痴呆症被称为FTD,是一种破坏性的疾病,其中患者有行为,个性和社会技能的巨大变化。FTD发病年龄是相对年轻的,发病年龄是在50岁末左右。患者预后严峻,病情会迅速恶化,通常在发病后10年内死亡。目前,还没有有效的治疗方法。

UAB研究小组关注与某些基因的突变,主要是微管相关蛋白tau基因。tau蛋白的聚集与阿尔茨海默氏病——老年痴呆症的最常见的形式相关联。但很少有人知道tau蛋白突变如何影响特定的大脑区域,并导致FTD。

UAB研究人员使用新小鼠模型,其表达FTD相关tau蛋白基因突变。这些小鼠表现出类似于FTD患者的物理行为,如强迫、过度重复操作如梳理动作。老鼠特定大脑网络区域中存在受损的突触和神经元网络功能。

Erik Roberson医学博士说:我们发现,突变的tau蛋白通过减少NMDA(谷氨酸受体),损害神经突触(神经元之间的连接)。研究小组随后采用环丝氨酸(已由FDA批准提振NMDA受体功能的药物)发现,NMDA受体功能的提升能够恢复突触激发,并由此恢复动物模型的神经元网络活动。正常神经元网络活动能纠正小鼠的行为异常。

这项研究帮助理解tau蛋白突变如何影响特定的大脑区域,以损害神经元网络。这也提供了一个潜在的治疗靶标即NMDA受体来纠正网络和行为异常。Roberson研究小组推测,增加NMDA受体功能可以造福人类FTD患者。

原始出处

Warmus BA1, Sekar DR2, McCutchen E2, Schellenberg GD3, Roberts RC4, McMahon LL5, Roberson ED6.Tau-Mediated NMDA Receptor Impairment Underlies Dysfunction of a Selectively Vulnerable Network in a Mouse Model of Frontotemporal Dementia.J Neurosci. 2014 Dec 3

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    2014-12-12 lsndxfj
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